diff --git a/scenario/templates/boot_config_none_env.yaml b/scenario/templates/boot_config_none_env.yaml
new file mode 100644
index 0000000..91d130c
--- /dev/null
+++ b/scenario/templates/boot_config_none_env.yaml
@@ -0,0 +1,5 @@
+# Defines a Heat::InstallConfigAgent config resource which performs no config.
+# This environment can be used when the image already has the required agents
+# installed and configured.
+resource_registry:
+  "Heat::InstallConfigAgent": "OS::Heat::SoftwareConfig"
\ No newline at end of file
diff --git a/scenario/templates/test_server_software_config.yaml b/scenario/templates/test_server_software_config.yaml
index c173e2c..bf8fa9b 100644
--- a/scenario/templates/test_server_software_config.yaml
+++ b/scenario/templates/test_server_software_config.yaml
@@ -136,11 +136,7 @@
       signal_transport: {get_param: signal_transport}
 
   cfg_user_data:
-    type: OS::Heat::SoftwareConfig
-    properties:
-      config: |
-        #!/bin/sh
-        echo "user data script"
+    type: Heat::InstallConfigAgent
 
   server:
     type: OS::Nova::Server
@@ -154,7 +150,7 @@
       - network: {get_param: network}
       user_data_format: SOFTWARE_CONFIG
       software_config_transport: {get_param: software_config_transport}
-      user_data: {get_resource: cfg_user_data}
+      user_data: {get_attr: [cfg_user_data, config]}
 
 outputs:
   res1: